Statisticians like precision in their interval estimates. A low margin of error is needed to achieve this. Which of the following supports this when selecting sample sizes?
A) A larger sample size reduces the margin of error.
B) A smaller sample size reduces the margin of error.
C) A larger sample size increases the margin of error.
D) A sample size has no impact on the margin of error.

Question

Quizplus · Accepted Answer

A larger sample size reduces the margin of error. This is because as the sample size increases, the sample becomes more representative of the population, reducing the chance of sampling error and increasing the accuracy and precision of the estimate.

Statisticians Like Precision in Their Interval Estimates